Dispensing apparatus



March 12, 1929.

P. BOHLING 1,705,392

DISPENSING APPARATUS Filed April 25, 1927 Patented Mar. 12, 1929.

UNITE PETER BOHLIN G, OF HAMBURG-STEINWARDER, GERMANY, ASSIGNOR; BY MESN E AS- SIGNMENTS, TO SOCIETE'ANONYME POUR TOUS APPAREILLAGES, MEGANIQUES (SATAN), OF LEVALLOIS-PE'RET, FRANCE.

DISPENSING APPARATUS.

Application filed April 25, 1927, Serial No. 186,542, and in Germany May 10, 1926.

The object of the present invention is to prevent the drawing oil or tapping of oil, liquid fuel or otherliquids from tanks or barrels or other closed vessels in shops for example by retailers and others who have undertaken to only sell the supplies of a particular firm. The retailers in such cases are not expected to provide the the tanks and pumps or the like for containing and supplying the prescribed quantities as the wholesale distributors supply these tanks and pumps to .merchants or to shops and they are marked with trade marks or brands or labels or other means of identification so that the purchaser can always see that he is given the oil for example that he requiresas supplied by a particular distributor.

At the present time there is nothing to prevent a merchant selling oil which has not been supplied by the distributor whose mark appears on the tank or pump, so that the purchaser may be surreptitiously given an oil of unknown origin or of inferior quality. This can be done by the retailer either filling up the tank belonging to a well known distributor with some other distributors oil, or by applying the pump supplied by the well known distributor to a tank filled with oil of inferior quality. In the latter case the customers suspicions are not aroused since the pump bears the mark or label of the. well known distributor.

Both these malpractices will be prevented by the apparatus of the present invention. This apparatus aims on the one hand at makmg it impossible that the tank supplied by and bearing the mark of a well known distributor can be filled through the outlet with which the pump is to be connected and on the other hand the pump is so constructed that it can only operate in connection with this particular tank and it will be inoperative with other tanks.

VVit-h regard to the surreptitious filling of the tank with oil, only the opening to which the pump is to be connected that is the outlet opening need be taken into consideration, as the filling opening proper is fitted with a closure provided with a lead seal. The, introduction of oil through the outlet opening is impossible in apparatus according to this invention because this outlet communicates with a pipe projecting down into the tank and provided with an automatic or non-return valve. In order that the pump cannot be used with any tank other than the one to which it is properly associated the suctionvalve of the pump is omitted and means are provided for preventing the subsequent application of a suction valve directly to the pump. Now if the pump without a suction valve is connected to the correct tank the aforesaid pipe communicating with the outlet opening of the tank forms a suction pipe and its valve the suction valve for the pump so that with such a combination the pump is operative. I

In the accompanying drawing Figure 1 is a vertical section of a tank constructed ac: cording to the present invention, and

Figure 2 a vertical section of a pump to be used in connection with the tank shown in Figure 1.

Figure 3 is a vertical section of the complete apparatus, the pump beingconnected to the tank.

The tank 'a which may be cylindrical is generally made of sheet iron, the inlet or filling opening being closed by a closure 6, that maybe provided with a lead seal. One of the end walls, preferably the top, is provided with the outlet opening in which is fitted a connect ing socket 0 adapted to be connected with the pump d, which where it is to be connected to the tank as at k is provided'with means for connection to the socket c by any suitable means. In the construction shown the connecting plug it is provided with external screw threads, and the socket c with internal screw threads engaging with the external screw threads of the plug it. The socket c is secured to an open ended'tube projecting down nearly to the bottom of the tank'and provided there with a valve f constructed to open upwardly but closing downwardly to prevent liquid from being admitted into the tank through the tube 6, the valve casing f having openings f near the bottom of the tank. Any attempt therefore to admit liquid into the tank through the outlet opening 0 will be prevented by the valve The pump d that is provided with an adjustable piston 9 will be connected to the tank by screwing the plug 72. into the socket 0 but having no suction valve it is inoperative by itself.

To prevent the pump d being subsequently provided with a valve, for instance a ball that 'might close the suction port or channel It in the plug 72., this channel 71. at its upper end,

that is to say where it merges into the cylinder is provided withincisions 7a or with projections is so that if a valve or ball were to be dropped into the punip the port or channel it would not be closed thereby.

Thus it will be obvious that the pump d in any event will be inoperative except when connected to the proper tank shown in Fig. 1 in which case the pipe 6 .andthe valve will constitute its suction pipe and its'suc tion valve, so that when both parts are com-v bined, as shown in Fig. 3 the pump will be J operative.

To allow air to enter the tank from above when drawing oil the liquid a'small channel 5 is provided in the connecting plugh of the pump that communicates with the inside of the tank through thesmall opening m in the socket c.

"I-hclaim vApparatus for preventing the surreptitious supply of oil, liquid fuel-or the like comprising a vessel forming a reservoir and a pump therefor including a sectional liquid receiving conduit having the usual cooperating suction and check valves in said conduit, the sections of said conduit being detachably connected between said valves, 'so as to constituteanoperative pump only when connected, that .section containing the check valve extending within the vessel and beinga unitary part thereof, and the outer section of the liquid name to this specification.

PETER B GHLING. 

